[reactos] 01/01: [IPHLPAPI] Start handling certain flags in GetAdaptersAddresses()

[Pierre Schweitzer]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=6d6e3712259e06cc49b75…

commit 6d6e3712259e06cc49b753447a8bdfe49a4eabc4
Author:     Pierre Schweitzer <pierre(a)reactos.org>
AuthorDate: Mon Nov 26 22:41:25 2018 +0100
Commit:     Pierre Schweitzer <pierre(a)reactos.org>
CommitDate: Mon Nov 26 22:43:43 2018 +0100

    [IPHLPAPI] Start handling certain flags in GetAdaptersAddresses()
    
    For now, we only support the most useful ones: IP_ADAPTER_DDNS_ENABLED,
    IP_ADAPTER_REGISTER_ADAPTER_SUFFIX, IP_ADAPTER_DHCP_ENABLED
---
 dll/win32/iphlpapi/address.c | 47 +++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 46 insertions(+), 1 deletion(-)

diff --git a/dll/win32/iphlpapi/address.c b/dll/win32/iphlpapi/address.c
index be9e147c38..2c124195fb 100644
--- a/dll/win32/iphlpapi/address.c
+++ b/dll/win32/iphlpapi/address.c
@@ -265,6 +265,51 @@ EnumerateServerName(
     *Ptr = &ServerAddress->Next;
 }
 
+static
+VOID
+QueryFlags(
+    _In_ PUCHAR Interface,
+    _In_ DWORD InterfaceLength,
+    _Out_ LPDWORD Flags)
+{
+    HKEY InterfaceKey;
+    CHAR KeyName[256];
+    DWORD Type, Size, Data;
+
+    *Flags = 0;
+
+    snprintf(KeyName, 256,
+            
"SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces\\%*s",
+             InterfaceLength, Interface);
+
+    if (RegOpenKeyExA(HKEY_LOCAL_MACHINE, KeyName, 0, KEY_READ, &InterfaceKey) ==
ERROR_SUCCESS)
+    {
+        Size = sizeof(DWORD);
+        if (RegQueryValueExA(InterfaceKey, "EnableDHCP", NULL, &Type,
(LPBYTE)&Data, &Size) == ERROR_SUCCESS &&
+            Type == REG_DWORD && Data == 1)
+        {
+            *Flags |= IP_ADAPTER_DHCP_ENABLED;
+        }
+
+        Size = sizeof(DWORD);
+        if (RegQueryValueExA(InterfaceKey, "RegisterAdapterName", NULL,
&Type, (LPBYTE)&Data, &Size) == ERROR_SUCCESS &&
+            Type == REG_DWORD && Data == 1)
+        {
+            *Flags |= IP_ADAPTER_REGISTER_ADAPTER_SUFFIX;
+        }
+
+        Size = 0;
+        if (RegQueryValueExA(InterfaceKey, "NameServer", NULL, &Type,
(LPBYTE)&Data, &Size) != ERROR_SUCCESS)
+        {
+            *Flags |= IP_ADAPTER_DDNS_ENABLED;
+        }
+
+        RegCloseKey(InterfaceKey);
+    }
+
+    // FIXME: handle 0x8 -> 0x20
+}
+
 DWORD
 WINAPI
 DECLSPEC_HOTPATCH
@@ -438,7 +483,7 @@ GetAdaptersAddresses(
                 CurrentAA->IfIndex = Entry->if_index;
                 CopyMemory(CurrentAA->PhysicalAddress, Entry->if_physaddr,
Entry->if_physaddrlen);
                 CurrentAA->PhysicalAddressLength = Entry->if_physaddrlen;
-                CurrentAA->Flags = 0; // FIXME!
+                QueryFlags(&Entry->if_descr[0], Entry->if_descrlen,
&CurrentAA->Flags);
                 CurrentAA->Mtu = Entry->if_mtu;
                 CurrentAA->IfType = Entry->if_type;
                 if(Entry->if_operstatus >= IF_OPER_STATUS_CONNECTING)